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Title: Structure of Se-rich As-Se glasses by high-resolution x-ray photoelectron spectroscopy

Abstract

To establish the validity of various proposed structural models, we have investigated the structure of the binary As{sub x}Se{sub 100-x} chalcogenide glass family (x{<=}40) by high-resolution x-ray photoelectron spectroscopy. From the composition dependence of the valence band, the contributions to the density of states from the 4p lone pair electrons of Se and the 4p bonding states and 4s electrons of Se and As are identified in the top part of the band. The analysis of Se 3d and As 3d core-level spectra supports the so-called chain crossing model for the atomic structure of Se-rich As{sub x}Se{sub 100-x} bulk glasses. The results also indicate small deviations ({approx}3-8%) from this model, especially for glass compositions with short Se chains (25<x{<=}40). For example, the presence of As-As homopolar defect bonds in the stoichiometric As{sub 40}Se{sub 60} and of Se-Se-Se fragments in a glass with composition x=30 is established.

Authors:
; ; ; ;  [1]
  1. Lviv Scientific Research Institute of Materials of SRC 'Carat', 202 Stryjska street, Lviv, UA-79031 (Ukraine)
Publication Date:
OSTI Identifier:
21055167
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 76; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevB.76.125208; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ARSENIC SELENIDES; BOUND STATE; DEFECTS; DENSITY; ELECTRONS; GLASS; RESOLUTION; SPECTRA; STOICHIOMETRY; STRUCTURAL MODELS; VALENCE; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Golovchak, R, Kovalskiy, A, Miller, A C, Jain, H, Shpotyuk, O, Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, and Institute of Physics of Jan Dlugosz University, 13/15, aleja Armii Krajowej, Czestochowa PL-42201. Structure of Se-rich As-Se glasses by high-resolution x-ray photoelectron spectroscopy. United States: N. p., 2007. Web. doi:10.1103/PHYSREVB.76.125208.
Golovchak, R, Kovalskiy, A, Miller, A C, Jain, H, Shpotyuk, O, Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, & Institute of Physics of Jan Dlugosz University, 13/15, aleja Armii Krajowej, Czestochowa PL-42201. Structure of Se-rich As-Se glasses by high-resolution x-ray photoelectron spectroscopy. United States. https://doi.org/10.1103/PHYSREVB.76.125208
Golovchak, R, Kovalskiy, A, Miller, A C, Jain, H, Shpotyuk, O, Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, and Institute of Physics of Jan Dlugosz University, 13/15, aleja Armii Krajowej, Czestochowa PL-42201. Sat . "Structure of Se-rich As-Se glasses by high-resolution x-ray photoelectron spectroscopy". United States. https://doi.org/10.1103/PHYSREVB.76.125208.
@article{osti_21055167,
title = {Structure of Se-rich As-Se glasses by high-resolution x-ray photoelectron spectroscopy},
author = {Golovchak, R and Kovalskiy, A and Miller, A C and Jain, H and Shpotyuk, O and Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195 and Institute of Physics of Jan Dlugosz University, 13/15, aleja Armii Krajowej, Czestochowa PL-42201},
abstractNote = {To establish the validity of various proposed structural models, we have investigated the structure of the binary As{sub x}Se{sub 100-x} chalcogenide glass family (x{<=}40) by high-resolution x-ray photoelectron spectroscopy. From the composition dependence of the valence band, the contributions to the density of states from the 4p lone pair electrons of Se and the 4p bonding states and 4s electrons of Se and As are identified in the top part of the band. The analysis of Se 3d and As 3d core-level spectra supports the so-called chain crossing model for the atomic structure of Se-rich As{sub x}Se{sub 100-x} bulk glasses. The results also indicate small deviations ({approx}3-8%) from this model, especially for glass compositions with short Se chains (25<x{<=}40). For example, the presence of As-As homopolar defect bonds in the stoichiometric As{sub 40}Se{sub 60} and of Se-Se-Se fragments in a glass with composition x=30 is established.},
doi = {10.1103/PHYSREVB.76.125208},
url = {https://www.osti.gov/biblio/21055167}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 12,
volume = 76,
place = {United States},
year = {2007},
month = {9}
}